Hi @Emelova Welcome to the community! Our minimum requirement for a course is that it contains at least 30 minutes of video content contained within at least 5 lectures.
Here are some great resources to help you get started:
Teaching Center: find articles about teaching on Udemy – from course creation to marketing your course
Course Quality Checklist: a helpful checklist to ensure your course meets the minimum requirements
Udemy Insights “How To” Video Courses: get started with the Course Goals course
How to Become an Instructor: FAQ
Please let me know if you have any other questions.